CHANGES TO AN EXISTING WEBSITE

Hi guys, I need to find someone who is an expert in PHP. There is an old website that needs to be updated. It was coded in PHP (using MySQL) database. There are only a couple of things that need to be changed. Everything including the website address can be found in the attached documentation. I know it's quite difficult to bid for a website if you don't see the code from inside. I guess it it will take you several days to look into the system and then a day to do the changes. It is important to understand how the system works. Thank you.